Cod sursa(job #2153762)

Utilizator wilson182Alexandrina Panfil wilson182 Data 6 martie 2018 13:58:11
Problema Algoritmul lui Dijkstra Scor 0
Compilator cpp Status done
Runda Arhiva educationala Marime 0.77 kb
#include<bits/stdc++.h>
using namespace std;
const int N=50020, INF=9999999999;
int d[N];
set <pair<int, int> > h;
vector <pair<int,int> > mda[N];
int main(){
	ifstream f("dijkstra.in");
	ofstream g("dijkstra.out");
	int n, m;
	f>>n>>m;
	for(int i=2;i<=n;i++)d[i]=INF;
	d[1]=0
	while(m--){
		int x, y, z;
		f>>x>>y>>z;
		mda[x].push_back({y, z});
	}
	h.insert({0, 1});
	while(!h.empty()){
		int nod=h.begin()->second;
		h.erase(h.begin());
		int l=mda[nod].size();
		for(int i=0;i<l;i++){
			int x=mda[nod][i].first, y=mda[nod][i].second;
			if(d[x]>d[nod]+y){
				if(d[x]!=INF){
					h.erase(h.find(make_pair(d[x], x)));
				}
				d[x]=d[nod]+y;
				h.insert({d[x], x});
			}
		}
	}
	for(int i=2;i<=n;i++)if(d[i]==INF)g<<"0 "; else g<<d[i]<<' ';
}